Regression from g++-4.3 for GNU C++ 4.4.0 20090315 (experimental)
(+also for 4.4.0 20090313 (Red Hat 4.4.0-0.26))
For full namespace import one should use DW_TAG_imported_module.
1:namespace A
2:{
3: int i = 1;
4:}
5:
6:int
7:main ()
8:{
9: using namespace A;
10: i = 2;
11: return 0;
12:}
Using g++-4.4 DWARF one must use `A::i' at `main' in the debugger.
The whole namespace `A' should be imported there instead.
WRONG g++-4.4 debuginfo:
< c> DW_AT_producer : (indirect string, offset: 0x0): GNU C++ 4.4.0
20090315 (experimental)
<1><2d>: Abbrev Number: 2 (DW_TAG_subprogram)
<2f> DW_AT_name : (indirect string, offset: 0x7d): main
<2><51>: Abbrev Number: 3 (DW_TAG_lexical_block)
<52> DW_AT_low_pc : 0x4
<5a> DW_AT_high_pc : 0x13
<3><62>: Abbrev Number: 4 (DW_TAG_imported_declaration)
<65> DW_AT_name : A
<67> DW_AT_import : <0x74> [Abbrev Number: 6 (DW_TAG_namespace)]
<1><74>: Abbrev Number: 6 (DW_TAG_namespace)
<75> DW_AT_name : A
<2><7d>: Abbrev Number: 7 (DW_TAG_variable)
<7e> DW_AT_name : i
<82> DW_AT_MIPS_linkage_name: (indirect string, offset: 0x74): _ZN1A1iE
Correct g++-4.3 debuginfo:
< c> DW_AT_producer : (indirect string, offset: 0x0): GNU C++ 4.3.2
20081105 (Red Hat 4.3.2-7)
<1><2d>: Abbrev Number: 2 (DW_TAG_subprogram)
<2f> DW_AT_name : (indirect string, offset: 0x80): main
<2><51>: Abbrev Number: 3 (DW_TAG_imported_module)
<54> DW_AT_import : <0x60> [Abbrev Number: 5 (DW_TAG_namespace)]
<1><60>: Abbrev Number: 5 (DW_TAG_namespace)
<61> DW_AT_name : A
<2><69>: Abbrev Number: 6 (DW_TAG_variable)
<6a> DW_AT_name : i
<6e> DW_AT_MIPS_linkage_name: (indirect string, offset: 0x77): _ZN1A1iE
<72> DW_AT_type : <0x59>
It causes regressions on gdb.cp/namespace-using.exp for the GDB project Archer.
--
Summary: DW_TAG_imported_module should be used (not
DW_TAG_imported_declaration)
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jan dot kratochvil at redhat dot com
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39471
